This set of 8.2 inches brushes consist of twisted handle rod and nylon brush with the diameter of 2, 3, 4, 5, 6, 8, 12, 16, 20 and 24 mm (1/16, 1/9, 1/6, 1/5, 1/4, 1/3, 1/2, 2/3, 3/4, and 1 inches). It can get into hard-to-reach spaces. You can always find a fit tool when cleaning gaps, dead angle places. Perfect for: Bottles/Colanders/Dishes/Drinking Straws/Drip Tips/Espresso Machines/Glasses/Glass Droppers and Dropper Bottles/Guns/Hummingbird Feeders/Jewelry/Keyboards/Paint Spray Guns/Pipes/Pressure Cookers/Sewing Machines/Sippy Cups/Small Nozzles/Tattoo Equipment/Thermal Coffee Tops/Tubes/Vaporizers/Water Pumps/Baby products, ect. Notice: - After use, be sure to rinse the brush well and dry it before storing it. - If the bristles bend, they can be straightened when the brush is dipped in hot water t. -Please be careful with the top of the brush so as not to scratch your hand, please do not let the child use this brush.